SEA-FISHERIES LABORATORY. 479 



Morecambe Mussels. 



2 July, 1912. 



A sample of mussels from Bare Ayre Point. 



Five mussels emulsified in 250 c.c. of sterile water. 



1 c.c. of emulsion = 



(0-02 mussel) contained 27 intestinal bacteria (2 plates contained colour- 

 less bacteria). 

 96 

 95 

 53 

 39 

 Mean No. of intestinal bacteria per mussel — 3100. 



3 July, 1912. 



A sample of mussels from Little-out Skear. 



Five mussels emulsified in 250 c.c. of sterile water. 



1 c.c. of emulsion = 



(0-02 mussel) contained 17 intestinal bacteria (1 plate contained colourless 



colonies). 



5 



3 



22 



13 



Mean No. of intestinal bacteria per mussel = 600. 



23 November, 1912. 



A sample of mussels from Stone Skear. 



Five mussels emulsified in 250 c.c. of sterile water. 



1 c.c. of emulsion = 



(0'02 mussel) contained 4 intestinal bacteria (No colourless colonies). 



9 



8 



3 „ 

 Mean No. of intestinal bacteria per mussel = 300. 



Water Analyses — 



Numbers of intestinal bacteria in 1 c.c. of water 



from : — 



Bare Ayre Pt. (3 July, 1912), 61, 44, 36, 43, 28. Mean = 42. 



Little-out Skear (3 July, 1912), 0, 1, 0,' 1, 0. Mean = 0-4. 



Bare Ayre Pt. (23 November, 1912), 7, 11. Mean = 9. 



Channel, off Central Pier (23 November, 1912), 3, 8. Mean = 5-5. 



Channel, off Old Harbour (23 November, 1912), 6, 14. Mean = 10. 



Channel, half-way Old Harbour to West End Pier (23 November, 1912), 



28, 40. Mean = 34. 

 Near Main Sewer Outfall (23 November, 1912), 3, 2. Mean = 2-5. 

 Off Reap Skear (23 November, 1912), 3, 5. Mean = 4. 



